春天:一个类可以同时是@Document和@Table吗? [英] Spring : Can a class be both @Document and @Table

问题描述

我在MVC上下文中使用spring.我正在使用Cassandra和MonogDB.对于项目，我必须使我的模型和dao类与这两个数据库兼容. @Document和@Table是否可能具有相同的模型类? spring能够在运行时做出区分吗?

I am using spring in MVC context. I am working with Cassandra and MonogDB. For the project, I have to make my models and dao classes compatible with both databases. Is it possible to have the same model class be @Document and also be @Table? Will spring be able to make the distinction at runtime?

例如，我将拥有mongo

For example, for mongo i will have

@Document
public class Book{

    @Id
    private String uniqueId;

    /*Other details*/
}

对于卡桑德拉，我将拥有

and for cassandra i will have

@Table
public class Book{

    @PrimaryKeyColumn(name = "uniqueId", ordinal = 0, type = PrimaryKeyType.PARTITIONED, ordering = Ordering.ASCENDING)
    private String uniqueId;

    /*Other details*/
}

我可以给类似

@Table
@Document
public class Book{

    @PrimaryKeyColumn(name = "uniqueId", ordinal = 0, type = PrimaryKeyType.PARTITIONED, ordering = Ordering.ASCENDING)
    @Id
    private String uniqueId;

    /*Other details*/
}

推荐答案

是的，这很有可能.一个经典的例子是当您希望在本地/测试和生产环境中拥有不同的数据源时.您可以在测试环境中使用Mongo，在生产环境中使用MySql.因此，您可以同时使用spring-data-mongo和javax.persistance批注

Yes it is very much possible. One classic example is when you want to have different datasources in your local/test and production environments. You could use Mongo in your test environment and MySql in production. So you could use both spring-data-mongo and javax.persistance annotations simultaneosly

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